dctlenv/libexec/dctlenv-version-name

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#!/usr/bin/env bash
set -uo pipefail
[ -d "$DCTLENV_ROOT/versions" ] || log_error 'No versions of driftctl installed. Please install one with: dctlenv install [<version>]'
DCTLENV_VERSION_FILE="$(dctlenv-version-file)" \
&& log_debug "DCTLENV_VERSION_FILE retrieved: $DCTLENV_VERSION_FILE" \
|| log_error 'Failed to retrieve DCTLENV_VERSION_FILE'
DCTLENV_VERSION="$(cat "$DCTLENV_VERSION_FILE" 2>/dev/null)" \
&& log_debug "DCTLENV_VERSION specified in DCTLENV_VERSION_FILE: $DCTLENV_VERSION" \
|| log_error "Version could not be resolved (set by $DCTLENV_VERSION_FILE or dctlenv use <version>)"
if [ ! -d "$DCTLENV_ROOT/versions/$DCTLENV_VERSION" ]; then
log_error "Version '$DCTLENV_VERSION' is not installed (set by $DCTLENV_VERSION_FILE)"
fi
echo $DCTLENV_VERSION